Kim Zolciak Shows Off Flat Stomach in Incredible Bikini Selfies

Real Housewives of Atlanta star Kim Zolciak has had six kids, but judging from these Instagram pictures she posted Tuesday, getting her bikini bod back has never been a problem for her.

Kim, 36, also went makeup-free in the pics, her hair tied up in a loose bun.

"Obsessed with @beachbunnyswimwear took my boys swimming today! They missed daddy throwing them up in the air and when I attempted to do it ... Well.. Let's just say they didn't go very far!! #nomakeup #natural," she wrote.